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Finding the Fourth Proportional to 707.40, 976.69 and 530.75

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Solution

The fourth proportional to 707.40, 976.69 and 530.75 is: 732.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.40 : 976.69 = 530.75 : x
  2. Step 2: Convert to fraction form
    707.40/976.69 = 530.75/x
  3. Step 3: Cross multiply
    707.40x = 976.69 × 530.75
  4. Step 4: Simplify right side
    707.40x = 518,381.32
  5. Step 5: Solve for x
    x = 518,381.32/707.40
  6. Step 6: Final answer
    x = 732.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.